736 HISTORY OF THE SEA. 



of cord in the water is so great as to prevent its yielding to a 

 sudden: jerk, such as is given to the attached end when the 

 vessel rises to a sea, and the line is apt to snap. 



Th ? results which have been gained by deep sea dredging 

 are so important that the English Government recently fitted 

 out another vessel, the Challenger, for such a cruise, witfc 

 every appliance. 



MADREPORES. 



